Alright, let's work through 41987243 times 18863143 step by step
41987243 × 18863143 = 18863143 × (41987243)
+ 18863143 × 3 yielding 56589429
+ 18863143 × 40 what gives us 754525720
+ 18863143 × 200 yielding 3772628600
+ 18863143 × 7000 resulting in 132042001000
+ 18863143 × 80000 what gives us 1509051440000
+ 18863143 × 900000 resulting in 16976828700000
+ 18863143 × 1000000 producing 18863143000000
+ 18863143 × 40000000 that is equal 754525720000000

= 792011368884749
